housing market with the national association of realtors. we have the latest developments on north korea. it is live at 7:00 a.m. eastern here on c-span. >> today's ceremony was the culmination of more than a decade of work went remains of they were recovered. they have great information on the height and some of the elements that they were not able to provide a dna match. >> this was a revolutionary type of ship. it would change warfare in one day. it is different from its predecessors. it was an entire ship made of iron. it was a transition from the wooden ship to the age of iron. more significant was the revolving gun turret. it was designed by john erickson who designed this with two guns. protected in a heavily armored turrets that could rotate 260 degrees. it separated the navigation from the firing of weapons. this change everything. the manager met on the field of battle. for four hours the ships slugged it out to a drop. what changed was the course that naval warfare would take. >> this weekend, at the history of the first ironclad